Flash Flood Prediction Program

Time: 801 PM Fri July 28, 2023 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 9:00 PM Message 1’s will be allowed to expire at 9pm as the threat of heavy rain has come to an end. Storms that have impacted the District have moved well east and onto the plains at this time. A few showers persist west bringing a slight chance for a few isolated showers through midnight, however most areas will remain dry. Skies will gradually clear through the rest of the overnight with clear skies likely by daybreak tomorrow. Mild and dry conditions expected through the overnight as low temperatures drop into the low to mid 60’s on the plains with mid to upper 50’s along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Any additional shower activity will be between a trace and 0.20” in 10-30 minutes. WORST CASE SCENARIO: A stronger shower is able to develop and will have the potential to produce 0.2-0.4” in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Lakewood 1 Current TO 900 PM Current TO 830 PM Wheat Ridge 1 Current TO 900 PM Current TO 830 PM Arvada 1 Current TO 900 PM Current TO 830 PM DIA 1 Current TO 900 PM Current TO 830 PM Arapahoe County 1 Current TO 900 PM Current TO 830 PM the City of Aurora 1 Current TO 900 PM Current TO 830 PM Denver County 1 Current TO 900 PM Current TO 830 PM Adams County 1 Current TO 900 PM Current TO 830 PM Douglas County 1 Current TO 900 PM Current TO 830 PM Broomfield County 1 Current TO 900 PM Current TO 830 PM Jefferson County 1 Current TO 900 PM Current TO 830 PM Boulder County 1 Current TO 900 PM Current TO 830 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 PM FRI Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Arapahoe Current TO 1159 PM FRI Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Boulder Current TO 1159 PM FRI Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Broomfield Current TO 1159 PM FRI Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Denver Current TO 1159 PM FRI Trace (20%) to 0.2" (10%) to 0.4" (5%) NONE Douglas Current TO 1159 PM FRI Trace (20%) to 0.2" (10%) to 0.4" (5%) NONE Jefferson Current TO 1159 PM FRI Trace (20%) to 0.2" (10%) to 0.4" (5%) NONE Foothills above 6500ft       Boulder Current TO 1159 PM FRI Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Douglas Current TO 1159 PM FRI Trace (20%) to 0.2" (10%) to 0.4" (5%) NONE Jefferson Current TO 1159 PM FRI Trace (20%) to 0.2" (10%) to 0.4" (5%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]